21729540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{389}}^1$

素因数の和:434

約数の個数: 144

約数和(自身を含む): 74692800

約数和(自身を除く): 52963260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 49, 57, 60, 70, 76, 84, 95, 98, 105, 114, 133, 140, 147, 190, 196, 210, 228, 245, 266, 285, 294, 380, 389, 399, 420, 490, 532, 570, 588, 665, 735, 778, 798, 931, 980, 1140, 1167, 1330, 1470, 1556, 1596, 1862, 1945, 1995, 2334, 2660, 2723, 2793, 2940, 3724, 3890, 3990, 4655, 4668, 5446, 5586, 5835, 7391, 7780, 7980, 8169, 9310, 10892, 11172, 11670, 13615, 13965, 14782, 16338, 18620, 19061, 22173, 23340, 27230, 27930, 29564, 32676, 36955, 38122, 40845, 44346, 51737, 54460, 55860, 57183, 73910, 76244, 81690, 88692, 95305, 103474, 110865, 114366, 147820, 155211, 163380, 190610, 206948, 221730, 228732, 258685, 285915, 310422, 362159, 381220, 443460, 517370, 571830, 620844, 724318, 776055, 1034740, 1086477, 1143660, 1448636, 1552110, 1810795, 2172954, 3104220, 3621590, 4345908, 5432385, 7243180, 10864770, 21729540]

約数ペア:

[(1, 21729540), (2, 10864770), (3, 7243180), (4, 5432385), (5, 4345908), (6, 3621590), (7, 3104220), (10, 2172954), (12, 1810795), (14, 1552110), (15, 1448636), (19, 1143660), (20, 1086477), (21, 1034740), (28, 776055), (30, 724318), (35, 620844), (38, 571830), (42, 517370), (49, 443460), (57, 381220), (60, 362159), (70, 310422), (76, 285915), (84, 258685), (95, 228732), (98, 221730), (105, 206948), (114, 190610), (133, 163380), (140, 155211), (147, 147820), (190, 114366), (196, 110865), (210, 103474), (228, 95305), (245, 88692), (266, 81690), (285, 76244), (294, 73910), (380, 57183), (389, 55860), (399, 54460), (420, 51737), (490, 44346), (532, 40845), (570, 38122), (588, 36955), (665, 32676), (735, 29564), (778, 27930), (798, 27230), (931, 23340), (980, 22173), (1140, 19061), (1167, 18620), (1330, 16338), (1470, 14782), (1556, 13965), (1596, 13615), (1862, 11670), (1945, 11172), (1995, 10892), (2334, 9310), (2660, 8169), (2723, 7980), (2793, 7780), (2940, 7391), (3724, 5835), (3890, 5586), (3990, 5446), (4655, 4668)]