19949580

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:316

約数の個数: 144

約数和(自身を含む): 70447104

約数和(自身を除く): 50497524

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 71, 84, 90, 105, 126, 140, 142, 180, 210, 213, 223, 252, 284, 315, 355, 420, 426, 446, 497, 630, 639, 669, 710, 852, 892, 994, 1065, 1115, 1260, 1278, 1338, 1420, 1491, 1561, 1988, 2007, 2130, 2230, 2485, 2556, 2676, 2982, 3122, 3195, 3345, 4014, 4260, 4460, 4473, 4683, 4970, 5964, 6244, 6390, 6690, 7455, 7805, 8028, 8946, 9366, 9940, 10035, 12780, 13380, 14049, 14910, 15610, 15833, 17892, 18732, 20070, 22365, 23415, 28098, 29820, 31220, 31666, 40140, 44730, 46830, 47499, 56196, 63332, 70245, 79165, 89460, 93660, 94998, 110831, 140490, 142497, 158330, 189996, 221662, 237495, 280980, 284994, 316660, 332493, 443324, 474990, 554155, 569988, 664986, 712485, 949980, 997479, 1108310, 1329972, 1424970, 1662465, 1994958, 2216620, 2849940, 3324930, 3989916, 4987395, 6649860, 9974790, 19949580]

約数ペア:

[(1, 19949580), (2, 9974790), (3, 6649860), (4, 4987395), (5, 3989916), (6, 3324930), (7, 2849940), (9, 2216620), (10, 1994958), (12, 1662465), (14, 1424970), (15, 1329972), (18, 1108310), (20, 997479), (21, 949980), (28, 712485), (30, 664986), (35, 569988), (36, 554155), (42, 474990), (45, 443324), (60, 332493), (63, 316660), (70, 284994), (71, 280980), (84, 237495), (90, 221662), (105, 189996), (126, 158330), (140, 142497), (142, 140490), (180, 110831), (210, 94998), (213, 93660), (223, 89460), (252, 79165), (284, 70245), (315, 63332), (355, 56196), (420, 47499), (426, 46830), (446, 44730), (497, 40140), (630, 31666), (639, 31220), (669, 29820), (710, 28098), (852, 23415), (892, 22365), (994, 20070), (1065, 18732), (1115, 17892), (1260, 15833), (1278, 15610), (1338, 14910), (1420, 14049), (1491, 13380), (1561, 12780), (1988, 10035), (2007, 9940), (2130, 9366), (2230, 8946), (2485, 8028), (2556, 7805), (2676, 7455), (2982, 6690), (3122, 6390), (3195, 6244), (3345, 5964), (4014, 4970), (4260, 4683), (4460, 4473)]