19906380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:256

約数の個数: 144

約数和(自身を含む): 66777984

約数和(自身を除く): 46871604

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 47, 52, 60, 65, 78, 90, 94, 117, 130, 141, 156, 180, 181, 188, 195, 234, 235, 260, 282, 362, 390, 423, 468, 470, 543, 564, 585, 611, 705, 724, 780, 846, 905, 940, 1086, 1170, 1222, 1410, 1629, 1692, 1810, 1833, 2115, 2172, 2340, 2353, 2444, 2715, 2820, 3055, 3258, 3620, 3666, 4230, 4706, 5430, 5499, 6110, 6516, 7059, 7332, 8145, 8460, 8507, 9165, 9412, 10860, 10998, 11765, 12220, 14118, 16290, 17014, 18330, 21177, 21996, 23530, 25521, 27495, 28236, 32580, 34028, 35295, 36660, 42354, 42535, 47060, 51042, 54990, 70590, 76563, 84708, 85070, 102084, 105885, 109980, 110591, 127605, 141180, 153126, 170140, 211770, 221182, 255210, 306252, 331773, 382815, 423540, 442364, 510420, 552955, 663546, 765630, 995319, 1105910, 1327092, 1531260, 1658865, 1990638, 2211820, 3317730, 3981276, 4976595, 6635460, 9953190, 19906380]

約数ペア:

[(1, 19906380), (2, 9953190), (3, 6635460), (4, 4976595), (5, 3981276), (6, 3317730), (9, 2211820), (10, 1990638), (12, 1658865), (13, 1531260), (15, 1327092), (18, 1105910), (20, 995319), (26, 765630), (30, 663546), (36, 552955), (39, 510420), (45, 442364), (47, 423540), (52, 382815), (60, 331773), (65, 306252), (78, 255210), (90, 221182), (94, 211770), (117, 170140), (130, 153126), (141, 141180), (156, 127605), (180, 110591), (181, 109980), (188, 105885), (195, 102084), (234, 85070), (235, 84708), (260, 76563), (282, 70590), (362, 54990), (390, 51042), (423, 47060), (468, 42535), (470, 42354), (543, 36660), (564, 35295), (585, 34028), (611, 32580), (705, 28236), (724, 27495), (780, 25521), (846, 23530), (905, 21996), (940, 21177), (1086, 18330), (1170, 17014), (1222, 16290), (1410, 14118), (1629, 12220), (1692, 11765), (1810, 10998), (1833, 10860), (2115, 9412), (2172, 9165), (2340, 8507), (2353, 8460), (2444, 8145), (2715, 7332), (2820, 7059), (3055, 6516), (3258, 6110), (3620, 5499), (3666, 5430), (4230, 4706)]