20804940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{523}}^1$

素因数の和:568

約数の個数: 144

約数和(自身を含む): 72098208

約数和(自身を除く): 51293268

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 17, 18, 20, 26, 30, 34, 36, 39, 45, 51, 52, 60, 65, 68, 78, 85, 90, 102, 117, 130, 153, 156, 170, 180, 195, 204, 221, 234, 255, 260, 306, 340, 390, 442, 468, 510, 523, 585, 612, 663, 765, 780, 884, 1020, 1046, 1105, 1170, 1326, 1530, 1569, 1989, 2092, 2210, 2340, 2615, 2652, 3060, 3138, 3315, 3978, 4420, 4707, 5230, 6276, 6630, 6799, 7845, 7956, 8891, 9414, 9945, 10460, 13260, 13598, 15690, 17782, 18828, 19890, 20397, 23535, 26673, 27196, 31380, 33995, 35564, 39780, 40794, 44455, 47070, 53346, 61191, 67990, 80019, 81588, 88910, 94140, 101985, 106692, 115583, 122382, 133365, 135980, 160038, 177820, 203970, 231166, 244764, 266730, 305955, 320076, 346749, 400095, 407940, 462332, 533460, 577915, 611910, 693498, 800190, 1040247, 1155830, 1223820, 1386996, 1600380, 1733745, 2080494, 2311660, 3467490, 4160988, 5201235, 6934980, 10402470, 20804940]

約数ペア:

[(1, 20804940), (2, 10402470), (3, 6934980), (4, 5201235), (5, 4160988), (6, 3467490), (9, 2311660), (10, 2080494), (12, 1733745), (13, 1600380), (15, 1386996), (17, 1223820), (18, 1155830), (20, 1040247), (26, 800190), (30, 693498), (34, 611910), (36, 577915), (39, 533460), (45, 462332), (51, 407940), (52, 400095), (60, 346749), (65, 320076), (68, 305955), (78, 266730), (85, 244764), (90, 231166), (102, 203970), (117, 177820), (130, 160038), (153, 135980), (156, 133365), (170, 122382), (180, 115583), (195, 106692), (204, 101985), (221, 94140), (234, 88910), (255, 81588), (260, 80019), (306, 67990), (340, 61191), (390, 53346), (442, 47070), (468, 44455), (510, 40794), (523, 39780), (585, 35564), (612, 33995), (663, 31380), (765, 27196), (780, 26673), (884, 23535), (1020, 20397), (1046, 19890), (1105, 18828), (1170, 17782), (1326, 15690), (1530, 13598), (1569, 13260), (1989, 10460), (2092, 9945), (2210, 9414), (2340, 8891), (2615, 7956), (2652, 7845), (3060, 6799), (3138, 6630), (3315, 6276), (3978, 5230), (4420, 4707)]