19531980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:536

約数の個数: 144

約数和(自身を含む): 67695264

約数和(自身を除く): 48163284

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, 491, 510, 585, 612, 663, 765, 780, 884, 982, 1020, 1105, 1170, 1326, 1473, 1530, 1964, 1989, 2210, 2340, 2455, 2652, 2946, 3060, 3315, 3978, 4419, 4420, 4910, 5892, 6383, 6630, 7365, 7956, 8347, 8838, 9820, 9945, 12766, 13260, 14730, 16694, 17676, 19149, 19890, 22095, 25041, 25532, 29460, 31915, 33388, 38298, 39780, 41735, 44190, 50082, 57447, 63830, 75123, 76596, 83470, 88380, 95745, 100164, 108511, 114894, 125205, 127660, 150246, 166940, 191490, 217022, 229788, 250410, 287235, 300492, 325533, 375615, 382980, 434044, 500820, 542555, 574470, 651066, 751230, 976599, 1085110, 1148940, 1302132, 1502460, 1627665, 1953198, 2170220, 3255330, 3906396, 4882995, 6510660, 9765990, 19531980]

約数ペア:

[(1, 19531980), (2, 9765990), (3, 6510660), (4, 4882995), (5, 3906396), (6, 3255330), (9, 2170220), (10, 1953198), (12, 1627665), (13, 1502460), (15, 1302132), (17, 1148940), (18, 1085110), (20, 976599), (26, 751230), (30, 651066), (34, 574470), (36, 542555), (39, 500820), (45, 434044), (51, 382980), (52, 375615), (60, 325533), (65, 300492), (68, 287235), (78, 250410), (85, 229788), (90, 217022), (102, 191490), (117, 166940), (130, 150246), (153, 127660), (156, 125205), (170, 114894), (180, 108511), (195, 100164), (204, 95745), (221, 88380), (234, 83470), (255, 76596), (260, 75123), (306, 63830), (340, 57447), (390, 50082), (442, 44190), (468, 41735), (491, 39780), (510, 38298), (585, 33388), (612, 31915), (663, 29460), (765, 25532), (780, 25041), (884, 22095), (982, 19890), (1020, 19149), (1105, 17676), (1170, 16694), (1326, 14730), (1473, 13260), (1530, 12766), (1964, 9945), (1989, 9820), (2210, 8838), (2340, 8347), (2455, 7956), (2652, 7365), (2946, 6630), (3060, 6383), (3315, 5892), (3978, 4910), (4419, 4420)]